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Updated: May 25, 2026

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown
Published on: February 14, 2014
[Measurement of OH radicals in flame with high resolution differential optical absorption spectroscopy]
Yu Liu1, Wen-Qing Liu, Rui-Feng Kan
1National Engineering and Technological Research Center for Environmental Optic Monitoring Instrument, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Heifei 230031, China. yliu@aiofm.ac.cn
Abstract:
The present paper describes a new developed high resolution differential optical absorption spectroscopy instrument used for the measurement of OH radicals in flame. The instrument consists of a Xenon lamp for light source; a double pass high resolution echelle spectrometer with a resolution of 3.3 pm; a multiple-reflection cell of 20 meter base length, in which the light reflects in the cell for 176 times, so the whole path length of light can achieve 3 520 meters. The OH radicals'6 absorption lines around 308 nm were simultaneously observed in the experiment. By using high resolution DOAS technology, the OH radicals in candles, kerosene lamp, and alcohol burner flames were monitored, and their concentrations were also inverted.
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